Severe Thunderstorms in the Ohio and Tennessee Valleys; Flash Flooding Possible in the Southwest

Scattered damaging winds, isolated severe hail, and a brief tornado or two are possible from the Upper Ohio to Tennessee Valleys during the late afternoon and evening. Across the Southwest, monsoonal moisture will continue to bring heavy rain and a threat for isolated to scattered flash flooding through Saturday. Read More >

Current conditions at

Somerville, Somerset Airport (KSMQ)

Lat: 40.62°NLon: 74.67°WElev: 105ft.

Fair

71°F

22°C

Humidity 84%
Wind Speed Calm
Barometer 29.90 in (1012.3 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 5 Sep 7:53 pm EDT
Extended Forecast for

Dayton NJ

  • Tonight

    Tonight: Mostly clear, with a low around 66. South wind 10 to 15 mph.

    Low: 66 °F

    Mostly Clear

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly after 2pm.  Partly sunny, with a high near 88. South wind 5 to 10 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 88 °F

    Mostly Sunny
    then T-storms
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Some of the storms could be severe.  Low around 58. Northwest wind 5 to 10 mph becoming north after midnight.  Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 58 °F

    Severe
    Thunderstorms
    then Showers

  • Sunday

    Sunday: A chance of showers before 2pm.  Cloudy, then gradually becoming mostly sunny, with a high near 73. Northwest wind around 5 mph becoming calm.  Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 73 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. Calm wind.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 66. South wind 10 to 15 mph.
Saturday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 88. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
Showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Some of the storms could be severe. Low around 58. Northwest wind 5 to 10 mph becoming north after midnight. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
A chance of showers before 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 73. Northwest wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Mostly clear, with a low around 50. Calm wind.
Monday
Sunny, with a high near 76.
Monday Night
Mostly clear, with a low around 51.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
Mostly cloudy, with a high near 73.
Wednesday Night
Mostly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 53.
Friday
Sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Dayton NJ
 40.39°N 74.49°W (Elev. 98 ft)
4:09 pm EDT Sep 5, 2025
8pm EDT Sep 5, 2025-6pm EDT Sep 12, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database